Hydrogen is a promising future sustainable fuel candidate with boundless opportunities.Research into photoelectrochemical(PEC)water splitting based on a lead halide perovskite(LHP)has progressed significantly with the...Hydrogen is a promising future sustainable fuel candidate with boundless opportunities.Research into photoelectrochemical(PEC)water splitting based on a lead halide perovskite(LHP)has progressed significantly with the aim of more efficient solar hydrogen production.Herein,we unite a well-known photo-absorbing LHP with cost-effective water-splitting catalysts,and we introduce two types of monolithic LHP-based PEC devices that act as a photocathode and a photoanode for the hydrogen evolution reaction and oxygen evolution reaction,leading to efficient unbiased overall water splitting.Through the integration of these two monolithic LHP-based photoelectrodes,an unbiased solar-to-hydrogen conversion efficiency of 10.64%and a photocurrent density of 8.65 mA cm^(−2) are achieved.展开更多
Introduction: The World Health Organization estimates that each year more than 20 million women suffer from the after-effects of unattended childbirth, of which 800 women die every day as a result of obstetric complic...Introduction: The World Health Organization estimates that each year more than 20 million women suffer from the after-effects of unattended childbirth, of which 800 women die every day as a result of obstetric complications. Objective: Study the socio-epidemiological aspects and prognosis of unassisted deliveries arriving at the Fousseyni Daou De Kayes hospital. Materials and Methods: This was a descriptive, cross-sectional study with prospective collection, case-control that took place at the maternity ward of the Fousseyni Daou hospital in Kayes, from<sup> </sup>1 January to 31 December 2021. Results: The frequency of unattended birth was 4.1%. The 30 - 35 age group was the most represented with 32.5%. In our study 58.1% of cases were out of school, 19.4% were primigestes and 39.4% were multiparous. In our series 60.6% of cases had given birth at home and 39.4% along the way. The majority of cases regretted having given birth without the assistance of qualified personnel in 45.6%. Maternal complications were dominated by perineal lesions in 14.4% of cases, haemorrhage of delivery in 25% of cases, severe anaemia in 30% of cases;16.7% of newborns were in poor condition, 13.6% were fresh stillbirths, 15.6% of newborns had obstetric trauma. The maternal death rate on arrival was 3%. Conclusion: The frequency of unassisted childbirth is high in the Kayes region. Its complications can be serious for both the mother and the newborn.展开更多
基金funded by the Ministry of Science and ICT(2019R1A2C3010479,2019M1A2A2065612,2021M3H4A1A03049662)Yonsei-KIST Convergence Research Program.
文摘Hydrogen is a promising future sustainable fuel candidate with boundless opportunities.Research into photoelectrochemical(PEC)water splitting based on a lead halide perovskite(LHP)has progressed significantly with the aim of more efficient solar hydrogen production.Herein,we unite a well-known photo-absorbing LHP with cost-effective water-splitting catalysts,and we introduce two types of monolithic LHP-based PEC devices that act as a photocathode and a photoanode for the hydrogen evolution reaction and oxygen evolution reaction,leading to efficient unbiased overall water splitting.Through the integration of these two monolithic LHP-based photoelectrodes,an unbiased solar-to-hydrogen conversion efficiency of 10.64%and a photocurrent density of 8.65 mA cm^(−2) are achieved.
文摘Introduction: The World Health Organization estimates that each year more than 20 million women suffer from the after-effects of unattended childbirth, of which 800 women die every day as a result of obstetric complications. Objective: Study the socio-epidemiological aspects and prognosis of unassisted deliveries arriving at the Fousseyni Daou De Kayes hospital. Materials and Methods: This was a descriptive, cross-sectional study with prospective collection, case-control that took place at the maternity ward of the Fousseyni Daou hospital in Kayes, from<sup> </sup>1 January to 31 December 2021. Results: The frequency of unattended birth was 4.1%. The 30 - 35 age group was the most represented with 32.5%. In our study 58.1% of cases were out of school, 19.4% were primigestes and 39.4% were multiparous. In our series 60.6% of cases had given birth at home and 39.4% along the way. The majority of cases regretted having given birth without the assistance of qualified personnel in 45.6%. Maternal complications were dominated by perineal lesions in 14.4% of cases, haemorrhage of delivery in 25% of cases, severe anaemia in 30% of cases;16.7% of newborns were in poor condition, 13.6% were fresh stillbirths, 15.6% of newborns had obstetric trauma. The maternal death rate on arrival was 3%. Conclusion: The frequency of unassisted childbirth is high in the Kayes region. Its complications can be serious for both the mother and the newborn.
